[Objectives]This study was conducted to improve acidic soil and enhance the quality of tobacco leaves.[Methods]The effects of different microbial fertilizers on improving acidic tobacco-planting soil and tobacco leaf ...[Objectives]This study was conducted to improve acidic soil and enhance the quality of tobacco leaves.[Methods]The effects of different microbial fertilizers on improving acidic tobacco-planting soil and tobacco leaf quality were investigated through plot experiments.[Results]The application of microbial fertilizers could improve the pH value of acidic soil,and composite microbial agent A showed the best application effect.The application of bio-organic fertilizer was beneficial to improving the contents of available phosphorus and available boron in acidic soil.The application of composite microbial agent A was beneficial to improving the contents of available phosphorus and available potassium in acidic soil,and could promote the growth of tobacco plants and improve the economic traits of flue-cured tobacco and the coordination of chemical components in tobacco leaves.The application of composite microbial agent B led to a downward trend in the content of available boron in acidic soil.The application of composite microbial agent B could promote the absorption of nutrients by tobacco plants,and improve their disease resistance and the quality of tobacco leaves.Due to the differences in functional microorganisms contained,the application effects of different microbial fertilizers in improving acidic tobacco-planting soil and improving tobacco leaf quality varied.Overall,the application of microbial fertilizers could increase soil pH,activate soil nutrients,promote tobacco growth,enhance disease resistance,increase tobacco output value,and improve tobacco quality.Microbial fertilizers have good application prospects in improving acidic soil and improving tobacco quality.[Conclusions]The application of microbial fertilizers to improve acidic tobacco-planting soil can ensure the normal growth and development of tobacco plants and the improvement of tobacco leaf quality,achieving high-quality and sustainable development of Zhaotong tobacco.展开更多
郯庐断裂带中段安丘-莒县断裂(F_(5))为中国东部重要的地震活动断裂,其最南段展布于淮河—女山湖之间,长约20km,最新活动时代为全新世早期。针对F_(5)断裂淮河—女山湖段的前期工作侧重于在不同地段开挖探槽以揭示断裂的最新活动时代、...郯庐断裂带中段安丘-莒县断裂(F_(5))为中国东部重要的地震活动断裂,其最南段展布于淮河—女山湖之间,长约20km,最新活动时代为全新世早期。针对F_(5)断裂淮河—女山湖段的前期工作侧重于在不同地段开挖探槽以揭示断裂的最新活动时代、结构特征及运动性质,并报道了零星的古地震事件。本次在该段选取关键地段开挖探槽并结合前期探槽资料,开展了古地震事件的综合对比研究;通过测量探槽附近断层陡坎的高度,并结合相关地层测年数据,计算了断裂的垂直滑动速率;基于该段古地震研究成果,结合其他学科资料,分析了苏皖交界地区的地震危险性。研究表明:(1)F_(5)断裂淮河—女山湖段中更新世晚期以来至少发生过5次古地震事件,厘定的最近2次事件的年代为20.36~(18.7±0.3) ka BP和10.92~7.83ka BP;(2)F_(5)断裂淮河—女山湖段紫阳山一带的垂直滑动速率约为0.05mm/a,陡山一带的垂直滑动速率约为0.07mm/a,该段整体属于弱活动断层;(3)F_(5)断裂泗洪—明光段为历史地震地表破裂空段,最近1次古地震的离逝时间较长,现今小地震不活跃,闭锁程度较高,易于应力积累,存在发生7级及以上强震的危险性。展开更多
基金Supported by Science and Technology Program Major Project of Yunnan Branch,China National Tobacco Corporation(2020530000241022)。
文摘[Objectives]This study was conducted to improve acidic soil and enhance the quality of tobacco leaves.[Methods]The effects of different microbial fertilizers on improving acidic tobacco-planting soil and tobacco leaf quality were investigated through plot experiments.[Results]The application of microbial fertilizers could improve the pH value of acidic soil,and composite microbial agent A showed the best application effect.The application of bio-organic fertilizer was beneficial to improving the contents of available phosphorus and available boron in acidic soil.The application of composite microbial agent A was beneficial to improving the contents of available phosphorus and available potassium in acidic soil,and could promote the growth of tobacco plants and improve the economic traits of flue-cured tobacco and the coordination of chemical components in tobacco leaves.The application of composite microbial agent B led to a downward trend in the content of available boron in acidic soil.The application of composite microbial agent B could promote the absorption of nutrients by tobacco plants,and improve their disease resistance and the quality of tobacco leaves.Due to the differences in functional microorganisms contained,the application effects of different microbial fertilizers in improving acidic tobacco-planting soil and improving tobacco leaf quality varied.Overall,the application of microbial fertilizers could increase soil pH,activate soil nutrients,promote tobacco growth,enhance disease resistance,increase tobacco output value,and improve tobacco quality.Microbial fertilizers have good application prospects in improving acidic soil and improving tobacco quality.[Conclusions]The application of microbial fertilizers to improve acidic tobacco-planting soil can ensure the normal growth and development of tobacco plants and the improvement of tobacco leaf quality,achieving high-quality and sustainable development of Zhaotong tobacco.
文摘郯庐断裂带中段安丘-莒县断裂(F_(5))为中国东部重要的地震活动断裂,其最南段展布于淮河—女山湖之间,长约20km,最新活动时代为全新世早期。针对F_(5)断裂淮河—女山湖段的前期工作侧重于在不同地段开挖探槽以揭示断裂的最新活动时代、结构特征及运动性质,并报道了零星的古地震事件。本次在该段选取关键地段开挖探槽并结合前期探槽资料,开展了古地震事件的综合对比研究;通过测量探槽附近断层陡坎的高度,并结合相关地层测年数据,计算了断裂的垂直滑动速率;基于该段古地震研究成果,结合其他学科资料,分析了苏皖交界地区的地震危险性。研究表明:(1)F_(5)断裂淮河—女山湖段中更新世晚期以来至少发生过5次古地震事件,厘定的最近2次事件的年代为20.36~(18.7±0.3) ka BP和10.92~7.83ka BP;(2)F_(5)断裂淮河—女山湖段紫阳山一带的垂直滑动速率约为0.05mm/a,陡山一带的垂直滑动速率约为0.07mm/a,该段整体属于弱活动断层;(3)F_(5)断裂泗洪—明光段为历史地震地表破裂空段,最近1次古地震的离逝时间较长,现今小地震不活跃,闭锁程度较高,易于应力积累,存在发生7级及以上强震的危险性。
